Peters



(No Model.) 3 Sheets-Sheet 1. J. G. HUDSON.

SUGAR MILL.

No. 416,623. Patented 1390.3, 1889.

N. PETERS. Phulolilhgmphur, Washlngmn, D, C.

(No Model.) f I 3 Sheets-Sheet 2.

J. G. HUDSON. I

SUGAR MILL.

' No.4 16,623. Patentedfigggiww.

\I 1: II" :11 53; lllllllllllllllllllllllill m1 m m (No Model.) 3 SheetsSheet' 3. i ,J. G. HUDSON. 5 SUGAR MILL.

No. 416,623. Patented M0 3, 1889.

' Hlllillllllllllilfm UNITED ST TEs" PATENT OFFICE.

JoHN GEORGE HUDSON, OF TRADESTON, COUNTIES OF LANARK AND RENFREW, soorLAND.

SUGAR-MILL.

SPECIFICATION forming part of Letters Patent No. 416,623, dated December 3, 1889. Application filed June 4, 1889- Serial No. 313,053. (No model.) Patented in England September 28,1887, No. 13,102.

To all whom it may'concern:

Be itknown that I, J OHN GEORGE HUDSON, engineer, a subject of the Queen of Great Britain, and a resident of Tradeston, in the counties of Lanark and Renfrew, Scotland, have invented certain new and useful Improvements in Sugar-Mills, (for which I have obtained Letters Patent in Great Britain, No. 13,102, bearing date of September 28, 1887,) of which the following is a full, clear, and exact description.

My invention, which relates to improvements in mills for'expressingjuice from sugarcane, has for its object to obtain a yielding pressure on the upper roller of such mills.

"My improvement consists in the construction of yielding devices for the cap-pieces forming the upper bearings of the upper roll, as hereinafter described, and pointed out in the claims.

In order that my invention may be fully understood, I will proceed to describe it with reference to the accompanying drawings,

forming part of this specification, in which Figure 1 is a side elevation of the first form of my invention, and Fig. 2 is an end View thereof. Fig. 3 is a side elevation of ainodification, and Fig. i is an end view of the same. Fig. 5 is a side elevation of another modification, and Fig. 6 is an end view of the same.

Like letters of reference indicate the same parts throughout the several views.

A A represent strong holding-bolts passing through the whole machine and securely fastened to the foundation.

B B are cap-pieces, forming the upper bearing of the upper roll 0 and capable of working vertically on the bolts A A, which pass through suitable perforations in said cappieces. The cap-pieces B B have each apair of grooves a a on their upper edge, forming seats for a pair of lower toggles 0. (Shown clearly in Fig. 1 and by dotted lines in Fig. 2.) Upon the upper part of bolts A across-piece D is carried and held in position thereon by screw-nuts E. These cross-pieces D D each have a pair of grooves c c, which form seats for the upper pairs of toggles F.

G G are central cross-pieces, the position and operation of which will be described farther on. The upper ends of the lower toggles O and the lower ends of the upper toggles F rest against and have bearing in suitable grooves formed on the upper and lower sides of the cross-pieces G G, as clearly shown in Fig. 1. Through each of these cross-pieces'G G two holes are formed, one 011 each side of their centers, as more particularly shown in Fig. 2, and through these holes the bolts I and J pass, each bolt being retained by its head in one of the cross-pieces, while its other end slides freely in'the corresponding hole in the other cross-piece. The head of the bolt I is retained by the cross-piece G, while the tail or body of the bolt passes freely through the cross-piece G, and correspondingly the head of the bolt J is retained by the cross-piece G, while its tail or body passes freely through the cross-piece G. The outer or free ends of these bolts I and J have screwed on them nuts N for holding in place washers M, which washers form the seats of the outer ends of volute springs L. I

On the cross-pieces G G are cast disks K, forming seats for the inner and larger ends of volute springs L. From the afore-described arrangement it will be readily seen that the pressurebetween roll 0 and its companion rolls can be regulated by screw-nuts N, the springsL affordinga yielding pressure.

The operation of the machine is as follows: The substance to be crushed is fed in between roll 0 and its companion roll, which action will raise the roll 0 slightly, and consequently its sliding bearing 13. As the bearing B rises it operates the toggles O and F, which pushes cross-pieces G'G' to one side against the action of springs L, said springs causing the several parts to resume their former or normal position when the mill has become empty. The position of the springs and toggles when the mill is in operation is shown in dotted lines in Fig. 1.

In the second form or modification of my invention (illustrated in Figs. 3 and 4) the cross-pieces G and G are dispensed with and the lower toggles O are formed with long upper ends P, which constitute levers against which the springs L act. The upper ends of levers P have cast thereon disks K, forming roo seats for the larger ends of springs L, as in the first form described. The lower ends of toggles C and the upper ends of toggles F have bearings in grooves a and 0, respectively, as in Fig. 1. The central connection, however, between the two is somewhat different. The toggles C have shoulders formed on their inner sides, upon which the lower ends of toggles F rest. In this form bolts I and J are done away with or substituted by single bolts Q on each side passing through suitable perforations in the upper ends of parts P and guiding their motion. The springs are secured on the bolts by means of washers and nuts, as before described, and the operation of the machine, which is apparent, is very similar to that of the first form.

InFigs. 5 and 6 I have illustrated another modification of my invention, differing, also,

as the first two forms do, in the arrangement of the toggles. In this form each of the toggles C and F is formed with levers R, each of which levers projects out horizontally, as shown clearly in Fig. 5. The outer ends of levers R are perforated, and through these perforations bolts U pass. The lower ends of these bolts U have caps or heads S, formed with knife-edges on their inner sides, which knife-edges rest in suitable grooves on the under side of the lower levers R. Disks K, having knife-edges on their under sides, are provided near the upper end of bolts U, forming the seats of springs L, which are held in place in the usual manner by nuts N. The knife-edges of these disks bear in suitable grooves on the upper side of the upper levers R. The toggles C and F have suitable central bearings, the toggle G forming a shoulder upon which the pivots of toggles F rest. The perforations through arms R must be of such size and shape to ad mit of their free movement from their normal position to that shown in dotted lines in Fig. 5. This modification operates substantially as those already described.

It is to be observed that in each of the modifications embodying my invention the action of the parts is such that at the time when the springs are least compressed, and therefore exerting their least pressure, they are acting at the greatest mechanical advantage or leverage, and vice versa.

The compensating action described enables the graduated pressure of the springs to be converted into a uniform pressure on the roller, or as nearly so as may be desired, by the selection of springs of range and power suited to the proportions of the toggle-levers.

If the springs are so proportioned as to give a uniform pressure on the roller, the effect will be identical with that of ahydraulic cylinder as commonly applied; but by preference I make the proportions such as to give a slowly-increasing pressure as the roll lift-s.

Having thus described my invention and the operation thereof, the following is what-I claim as new therein and desire to secure by Letters Patent: 7 I

1. The combination, with the upper roll and the holding-bolts, of the upper cap-pieces B B, working on the holding-bolts and forming the upper bearings of the upper roll, each cap-piece having a pair of grooves a a,whieh are located on opposite sides of the holdingbolts, the cross-pieces D D, which are secured to the holding-bolts, each cross-piece having a pair of grooves c c, which are located on opposite sides of the holding-bolts, two pairs of lower toggles C O, the toggles of eachpair located on opposite sides of the holding-bolts, two pairs of upper toggles F F, the toggles of each pair located on opposite sides of the holding-bolts, and the spring-bolts supported on the toggles by which the latter are forced to normal position for holding down the cappieccs with yielding pressure, substantially as described.

2. In a mill for crushing sugar-cane and the like, the combination of sliding cap-pieces B, cross-pieces D, and central pieces G G ,with toggles O F, held between said parts, and springs L and rods I and J, said rods extending through both of said parts G G, each being rigidly secured to one and freely adjustable in the other, substantially as herein explained.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN GEORGE HUDSON.

\Vitnesses: JOHN LIDDEE,

.TosErH HENRY PEARSON, Both of 115 St. Vincent Street, Glasgow. 

